Regex credit card number tests

Remove all , and - and other non-digits from the string first.

Then use this regex that matches Visa, MasterCard, American Express, Diners Club, Discover, and JCB cards:

^(?:4[0-9]{12}(?:[0-9]{3})?|[25][1-7][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$

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